研究生: |
林家旭 |
---|---|
論文名稱: |
Fe2AlCoCrNiMo0.5Bx高熵合金在室溫下之電化學性質 Electrochemical Properties of Fe2AlCoCrNiMo0.5Bx High Entropy Alloys under room Temperature |
指導教授: | 施漢章 |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
工學院 - 材料科學工程學系 Materials Science and Engineering |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 89 |
中文關鍵詞: | 高熵合金 、電化學 、極化曲線 、阻抗頻譜 |
相關次數: | 點閱:3 下載:0 |
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Fe2AlCoCrNiMo0.5Bx (Fe2)多元高熵合金在含有硫酸根的環境下,無論陽離子是氫離子或是鈉離子皆可以形成有效的鈍態膜,而其腐蝕速率會隨著氧氣分壓的增加而增加。而在氯化鈉溶液中,由於鈉離子的移動速率較慢故會有極限電流密度的存在,而其腐蝕行為則是受到擴散控制,而當溶液中氧氣分壓增加時,其腐蝕速率會先增後減,可能原因即為腐蝕產物增加後反而阻擋了擴散進行。
而在硫酸溶液中添加氯化鈉時,會使 Fe2高熵合金之鈍態能力衰退,並隨著添加氯化鈉的濃度增加衰退程度跟著增加。
過往研究指出,若是在 Fe2高熵合金添加不同莫耳比的硼原子時,可以提升其耐磨耗能力,而其在除氧硫酸中之抗腐蝕性質會隨著添加硼原子增多而衰減。在除氧氯化鈉溶液中,則是在添加微量時對抗腐蝕性質有些許助益,但是一旦添加超過莫耳比超過 0.5時,則其腐蝕性質會快速的衰減。
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